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Old 10-03-2009, 12:51 PM
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Problems starting after rebuilt

Hi!

We have been fixing 2001 Ford Excursion with 7.3l Powerstroke and now it's time to get it running again. Problem is that it won't start, starter turns engine ok and white smoke comes out from exhaust pipe but it doesn't start.

Sometimes while starting, engine just stops and gets jammed, after turning engine by hand a little bit and waiting for couple of minutes it turns again, also diesel fuel drops out from between connection of exhaust header and exhaust pipe leading to turbo. So i think we have fuel reaching injectors, but they migth not be working correctly?

We have chanced these parts: High pressure oil pump, fuel injectors, bigger turbo, water pump, starter, some sensors, filters, glow plugs. All other parts were cleaned prior to installing also cylinder heads were machined with new valves etc.

All wiring harness from engine compartment was removed for this rebuilt if something there has gone wrong could it be causing this problem?

So if anyone has and idea that might be useful please write, cause we are running out of ideas Im not sure if i rememberd to write down all information but i will update if necessery.
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Old 10-03-2009, 01:06 PM
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dude it sounds hydro locked. be careful. There is obviously a issue with one or more of the injector o rings. Your not able to acheive complete combustion somewhere accross the line, and this is causeing the in correct seated 0 ringed injectors to poop more fuel into cyliners without burning. You need to pull injectors and ensure there is not a ton of fuel sitting in a cylinder or you will bend stuff and ruin the motor. consult with a professional. find more help. look in the tech files. Someone who would know how to help you for sure would be Dirk. Havent seen him on here in a while tho...
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Old 10-04-2009, 11:51 AM
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Ok, we got the engine running now! There was indeed hydro-lock caused by one of the NEW injectors, it stayed open the whole time and would not close until power was cut. We put old ones back and after starting a couple of times it ran. First with 7 cylinders and after some time all of them. Only now it takes longer to start than before.
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Old 10-04-2009, 08:25 PM
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Your lucky you didnt ruin the motor.
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Old 10-04-2009, 08:31 PM
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Quote:
Originally Posted by EddieT101 View Post
Ok, we got the engine running now! There was indeed hydro-lock caused by one of the NEW injectors, it stayed open the whole time and would not close until power was cut. We put old ones back and after starting a couple of times it ran. First with 7 cylinders and after some time all of them. Only now it takes longer to start than before.
The good thing about that, is the injector needs HPO to let fuel out. So it would only inject fuel while you were cranking. If it coulda gone withouht HPO you'd be looking at another rebuld!
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Old 10-04-2009, 11:04 PM
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Quote:
Originally Posted by OregonStroker View Post
Your lucky you didnt ruin the motor.
Thats true, it took us some time before coming to conclusion that injector is malfunctioning, we had to crank engine without glow plugs to realize that only one cylinder is getting fuel... too much fuel and funny thing is that even after stopping cranking but keeping the ignition on we could hear the injector clicking and for some reason filling the cylinder fast, i guess it blew at wide open from get go. btw cylinder full of diesel comes out pretty quick from glow plug hole, it spread about 12 feet away from the car.

But yeah, we were very lucky for not snapping the rod!
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